<template>
  <div>
            <!-- 面包屑导航区 -->
      <el-breadcrumb separator="/">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>添加商品</el-breadcrumb-item>
      </el-breadcrumb>
      <el-card>
        <el-alert
          title="添加商品信息"
          type="info"
          center
          show-icon>
        </el-alert>
        <!-- 进度条 -->
        <el-steps  align-center :active="activeIndex-0" finish-status="success">
          <el-step class="title" title="基本信息"></el-step>
          <el-step title="商品参数"></el-step>
          <el-step title="商品属性"></el-step>
          <el-step title="商品图片"></el-step>
          <el-step title="商品内容"></el-step>
          <el-step title="商品完成"></el-step>
        </el-steps>

        <!-- tab栏区域 -->
       <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">  
         <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" >
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cateProps"
                @change="handleChange">
              </el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item v-for="item in manyTableData" :key="item.attr_id">{{ item.attr_name }}
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox border :label="cb" v-for="(cb,i) in item.attr_vals" :key="i"></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action表示图片要上传的api地址 -->
            <!-- handlePreview  处理图片预览效果 -->
            <!-- handleRemove 处理移除图片的操作 -->
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              :headers="headerObj"
              list-type="picture"
              :on-success="handleSuccess"
              
              >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器组件 -->
             <quill-editor v-model="addForm.goods_introduce"></quill-editor>
             <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
      </el-card>

      <!-- 图片预览对话框 -->
      <el-dialog
        title="图片预览"
        :visible.sync="previewVisible"
        width="50%"
        >
        <img :src="previewPath" alt="">
      </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
    created() {
      this.getCateList()
        
    },
    data() {
        return {
          activeIndex:'0',
          addForm:{
            goods_name:'',
            goods_price:0,
            goods_weight:0,
            goods_number:0,
            goods_cat:[],
            pics:[],
            //商品的详情描述
            goods_introduce:'',
            attrs:[]
          },
          addFormRules:{
            goods_name:[{ required: true, message: '请输入商品名称', trigger: 'blur' }],
            goods_price:[{ required: true, message: '请输入商品价格', trigger: 'blur' }],
            goods_weight:[{ required: true, message: '请输入商品重量', trigger: 'blur' }],
            goods_number:[{ required: true, message: '请输入商品数量', trigger: 'blur' }]
          },
          cateList:[],
          cateProps:{ 
            expandTrigger: 'hover',
            label:'cat_name',
            value:'cat_id',
            children:'children'
          },
          manyTableData:[],
          onlyTableData:[],
          uploadURL:'http://127.0.0.1:8888/api/private/v1/upload',
          // 图片上传的请求头
          headerObj:{
            Authorization:window.sessionStorage.getItem('token')
          },
          previewPath:'',
          previewVisible:false
        }
    },

    methods: {
      async getCateList(){
        const{data : res} = await this.$http.get('categories')
        if(res.meta.status !== 200){
          return this.$message.error('获取商品分类数据失败')
        }
        this.cateList = res.data
        
      },
      // 级联选择器
      handleChange(){
      },
      beforeTabLeave(activeName,oldActiveName){
        if(oldActiveName === '0' && this.addForm.goods_cat.length !== 3){
          this.$message.error('请先选择商品分类!')
          return false
        }

      },
      async tabClicked(){
        // 访问的是动态参数面板        
        if(this.activeIndex === '1'){
        const{data : res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params:{
            sel:'many'
          }})
          
          if(res.meta.status !== 200){
            return this.$message.error('获取动态数据列表失败')
          }
          res.data.forEach(item=>{
             item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
          })

          
          this.manyTableData = res.data
          
        }else if(this.activeIndex === '2'){
            // 访问的是静态参数面板  
          const{data : res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params:{
            sel:'only'
          }})
          if(res.meta.status !== 200){
            return this.$message.error('获取动态数据列表失败')
          }
          this.onlyTableData = res.data
          
        }
  
 

      },
      // 处理图片预览效果
      handlePreview(file){
        this.previewPath = file.response.data.url
        this.previewVisible = true
        
      },
      // 处理移除图片的操作
      handleRemove(file){
        
       const filePath = file.response.data.tmp_path
       const index = this.addForm.pics.findIndex(x =>x.pic === filePath)
       this.addForm.pics.splice(index,1)
      },
      // 监听图片上传成功的事件
      handleSuccess(response){
        const picInfo = {pic : response.data.tmp_path}
        this.addForm.pics.push(picInfo)
      },
       add(){
            // console.log(this.addForm);
            this.$refs.addFormRef.validate(async valid => {
              if(!valid) return this.$message.error('请填写必要的表单项!')
            const form = _.cloneDeep(this.addForm)
            form.goods_cat = form.goods_cat.join(',')
            // 处理动态参数
            this.manyTableData.forEach(item =>{
              const attrValsArray = Array.from(item.attr_vals || [])
              const newInfo = {
                 attr_id:item.attr_id,
                 attr_value:attrValsArray.join(' ')
              }
              this.addForm.attrs.push(newInfo)
            })
            //处理静态属性
            this.onlyTableData.forEach(item =>{
              
              const attrValsArray = Array.from(item.attr_vals || [])
              const newInfo = {
                 attr_id:item.attr_id,
                 attr_value:attrValsArray.join(' ')
              }
              this.addForm.attrs.push(newInfo)
            })
              form.attrs = this.addForm.attrs
              // console.log(form);
              // 发起请求添加商品
              // 商品的名称必须是唯一的
             const {data : res} = await this.$http.post('goods',form)
              if(res.meta.status !== 201){
                this.$message.error('添加商品失败')
              }
              this.$message.success('添加商品成功')
              this.$router.push('/goods')
            })
            

          }
    },
    computed:{
      cateId(){
        if(this.addForm.goods_cat.length === 3){
          return this.addForm.goods_cat[2]
        }
        return null
      }
    }

}
</script>

<style lang="less" scoped>
.el-steps{
  margin-top: 20px;
}
/deep/ .el-step__title{
  font-size: 13px;
}
.el-checkbox{
  margin: 0 5px 0 0 !important;
}
img{
  width: 100%;
}

.ql-editor{
  height: 300px;
}
.btnAdd{
  margin-top: 15px;
}
</style>